Gun mount



Oct. 7, 1952 Q. c. JOHNSON GUN MOUNT Filed July 5, '1949 INVEA ITOR. OU/NTON c. JOHNSON A 7' TORNE-Y Patented Oct. '7, 1952 'I 2,612,819]. GUN" mouisf'r QuintoniE. ohnson, Torrance; Calif assignor: to i l North-;American Aviation,.;,lnc.-. l

A ueati rm a s ie, serialnolmaoss This invention relates: to a, mounting ar rangement for guns. 1

It is a'nob-ject of this invention to; provide a gun mounting means which eliminates the useofa cradle in the attachment of automatic guns-tosupporting structures.

Itis a further object of this inventiorrtoprovide a mountingarrangement which enablesthe gun to be easilyand quicklymounted in close places and to members not in alignment, such asis commonly encountered inaircraft construction. 1

It is yet another object ofthis invention to provide a gun mount wherein the supporting post of the mount is in vertical alignment with the centerline'of the gun at alltimes.

It is still another object ofthis invention to provide a gun mount which readily, allows minor adjustments in the mounting arrangement.

Other objects of invention will becomeap-- parent from the following description taken in connection with the accompanying drawings, in which Fig. 1 is anelevational view'ofa gun mounting in accordance with the invention;

Fig. 2 is an elevational view of a portion of the rear mount;

Fig. 3 is a transverse sectional view of the mount taken along the line 3-3 of Fig. 2;

. Fig. 4 is a top plan view of the rear mount taken along the line 44 of Fig. 1;

Fig. 5 is a sectional view of the rear mount taken along the line 55 of Fig. 6;

Fig. 6 is a, sectional view taken along the line 6-6 of Fig. 5; and

Fig. 7 is an end view taken along the line 1-4 of Fig. 1.

Referring to the drawings there is shown a gun i, of the recoiling type, having a, barrel 2 attached thereto in a well known manner, and a free magazine 3 operatively associated therewith in a manner well known in the art. A portion of the barrel 2 is encased by sleeve 4 for supporting the forward portion of the gun. The.

sleeve 4 is provided with trunnions 5 for attachment to a yoke or front mount 6. The rear portion of the gun is adapted to be supported on a mount referred to generally as 1. This mount comprises a slideway 8 adapted to be attached to the gun inany suitable manner and provided with recesses 9 and It for receiving pairs of roller bearings H and I2, respectively. These bearings are trunnioned in a guideway l3 having a post It threadedly received in nut l5 which in turn is provided with teeth l6 for engagement with GrGltthnS. (Cl. SSE-+37).

. magazine 3;

manner well known in the artto'effect feeding operation of the cartridges; Recoil movement ofcorresponding teeth on member ll: Member l'i' issuitably mounted in ayblock lfl and is fittedson bolt l9=having a square portion 2E| for engagementwith member", andround portions 2| for rotatably mounting the bolt in the gun. mount member 22. Member 22 in turn is adapted'to be attached to supporting structure 2-3; such as a part of'-a n-ai rcraft-or the like; Block l8is adapted to-be shiftedlaterally with' respect, to member 2 2by reasonofits-threaded engagementwith bolt,

24- rotatablyreceived inmember- 22t Spring detents 25 and 26 hold bolt members I9ykand 24 in adjusted position. This; arrangement" allowspost 14 to be in; verticalalignment" with the centerline ofgunl'at all times} thereby-increasing-the accuracyof firingof the gun. and-avoiding' malfunctloning of the; same by-reason of stresseswhich mayobtain if eccentric mounts are used.

This invention isparticularly useful in instances when the gun-recoils with resp ect to feed Such movement is utilized in a the gun is controlled in the usual manner'by means. ofa'spring between the'barrel and-the zine be fixed with respect to the mounts.

front mount, as is well known in the art. In view of the fact that the feed magazine remains stationary with respect to the gun, and it is often difiicult to find mounting means for the feed magazine on the supporting structure such as'an aircraft, it is necessary that the feed maga- Accordingly, a tie rod 21 is adapted to be attached at one end to the front mount 6 and at the other end to the feed magazine 3. A universal connection 28 comprising a ball-and-socket joint, enables minor adjustments of the mount with respect to the feed magazine, and also a limited amount of rotative movement between mount 6 and feed magazine 3, as well as mount 22. This permits attachment of the gun in close places where members run in varying directions,'such asis commonly encountered in aircraft structure.

In the operation of the invention front mount 6 and rear mount 22 are suitably attached to supporting structure 23. Thereupon, sleeve member 4 is attached through trunnions 5 to front mount 6, and the barrel of the gun slid through the sleeve and adjusted so that rollers II and I2 are received in their respective recesses or guideways 9 and Ill. Tie rod 21 is adjusted so that its respective ends may be connected through balland-socket joint 28. This joint permits adjustment for variations in length between the front and rear mounts of various guns, and also permits the front mount to be placed at a slight angle with respect to the rear mount, if necessary for convenience of attachment to supporting struc- The gun is then sighted and adjusted .by

ture.

operation of members I?! and 24, operation of member l9 causing vertical movement of the gun through the teeth on members [5 and I1. Lateral causes lateral movement of block l8 in a direction bolt l9. This arrangement is .particularly -de= transverse to the longitudinal axis of the gun It 1 may be noted that, during each lateral movement, member I [7 slides with respect to portion 20 of sirable because it enables post M of th esglln'to saidv support, and means for moving said post he in vertical alignment with the centerline thereof at all times.

Although the invention has-been described and V V, illustrated in detail, it is to be clearly understoodthat the same is by way of illustration and example only and is not to be taken by way of limitation, the spiri t'and scope of this inventionbeing limited only byltlie terms of the appended claims. a

I claim:

1. A rear mount for a gun of the recoiling type comprising means for supporting the rear portion a of said gun with freedom forlongitudinal sliding movement including a post in alignment with the'centerline of the gun at all am s m ca for carrying said post, means for moving said block laterally with respect to a support,-.and means for moving said postverticallyr I 2. A rearmount for a gun of the recoiling type comprising support attaching means, a block carried by said support attaching means, means for moving said block laterally with respect to said support, a post carried by said block, means for moving ,said.post vertically with respect to said block, a guideway integral with theupper part of said post, andaslideway on said gun for a engagement with said guideway with said postin alignment with the centerline of the; gun at all timesf I L 3: A rear mount for agunof the recoiling type "j vertically;

I comprising a slideway attached to said gun, a

horizontal bearing means laterally spaced on either side of the centerline of the gun for absorbing vertical forces onithe gun, and a postattached to said guidewayin ;a1ignment"'with the vertical centerline of the gun.

H 4. A device as recited in claim 3 in which said first named bearing means comprises rollers in tandem.

A deviceas recited in claim 3 and further .including 'a. block for carrying said post, means for moving said block laterally with respect to :6. A mounting arrangement for a gun, said gun having a stationary part and a recoiling part, said mounting including a yoke having a trunnioned sleeve portion for supporting the barrel of the un, ,a slideway for slidably receiving the rear portion of the gun, and a universal connection be-q tween said yoke and the stationary part of the V gun, whereby the yoke may be angularly mounted with respect to the slideway; a. guicleway including apostmounted in vertical alignment with the centerline of the'gun, a block for carrying said post, means for adjusting said post vertically with respect to said block, and means for moving said blockiaterally. Y

' t QUINTON C. JOHNSON.

REFERENCES CITED s The following references are of record in the file of this patent; I

' UNITED STATES PATENTS Date Number, duzName r 1,939,699 Hofstetter Dec. 19, 1933 2,291,867 Birkigt Aug. 4', 1942 2,335,835 Zietlow Nov. 30, 1943 2,350,122. Martin May 30, 1944 2,876,835 Trotter May 22, 1945 2,380,173,

McMullen July 31, 1945 

